9)A critical surface is defined as an aircraft surface that does not have ice or snow before takeoff. Critical surfaces are determined by the aircraft manufacturer and typically include wings, operating surfaces, propellers, engine air intakes, the upper surface of the aircraft fuselage on which the engine is mounted at the rear, horizontal stabilizer, vertical stabilizer, or any other stability surface of the aircraft. Such as wings, engine air intakes, control surfaces, horizontal stabilizer, vertical stabilizer or other aircraft stabilizer. Is that right?【单选题】